A procedure results in pain relief without the use of naloxone, but the procedure is ineffective when naloxone is present, then we have direct evidence that ___________ may be responsible for the reduction in pain.

Question

Quizplus · Accepted Answer

Naloxone is an opioid antagonist that blocks the effects of opioids, including endorphins, which are the body's natural painkillers. If a procedure results in pain relief that is negated by naloxone, it suggests that endorphins are involved in the pain relief mechanism.

A Procedure Results in Pain Relief Without the Use of Naloxone